Building concerns

stuart45

Normally when the struts are removed you find that the purlins start to bend over time, although a lot of cut roofs are a bit over engineered, so this doesn't always happen. 
It's possible that the replacement struts weren't cut as accurately as the second joiner would have liked. 

HHarry

FreeBear said:

HHarry said:

It stayed upright for 4 years without the struts & another 13 years with the replacement struts. It’s unlikely it’s going anywhere.

That unfortunately, is poor thinking. It could be that some of the timbers are under excessive loads and right on the cusp of failure. A high wind hitting in just the right direction could be all that is needed. Or a small earthquake may be just enough to trigger a collapse - And yes, we do get earthquakes in the UK -> https://www.earthquakes.bgs.ac.uk/education/faqs/faq6.html

  So some work that was carried out 10 years ago, to a standard that was acceptable to a mortgage company is now suddenly sub-standard because another tradesman says so?  It’s withstood all the high winds and earthquakes that have hit it in the last 10 years.